and we'll interview caterpillar's ceo doug oberhelmin. now, we've been talking a lot about the downward movement in precious metals. we're continue tock on the lookout to see what people are doing when it comes to buying gold and silver. well, the largest coin show on the west coast kicks off today, and that's where we find jane wells, taking the pulse of the gold and silver bugs. >> very flashy, very nice. >> reporter: if you want to know how people feel about gold, don't look at the markets, look at the coin shows. >> on the entire floor, we're expecting business in the tens of millions of dollars. >> reporter: at the santa clara county show in the heart of silicon valley, thousands came to buy and sell, mostly buy. >> you see more buying. people interested in buying. >> why? >> they're taking advantage of the dips. >> reporter: kerry is buying. he is a wholesaler whose firm has been involved with big auctions, including one for a rare coin which sold for a record $10 million. what kind of coin is it? >> a 1794 silver dollar. >> for $10